METHOD AND APPARATUS FOR HOT MOLDING OF ARTICLES OF THERMOPLASTIC MATERIAL Russian patent published in 2005 - IPC

FIELD: processes and equipment for hot molding of articles of thermoplastic materials, namely panels used for lining automobile interior.

SUBSTANCE: method comprises steps of heating at least one plate of thermoplastic material till plasticization temperature; compressing heated plate between two molding mutually opposite surfaces of pair of die halves; injection molding of plastics in seat coupled with one of molding surfaces for making at least one insert secured to plate surface while compressing plate between molding surfaces. Said seat includes narrowed portion designed for lowering pressure of injected plastics at contact with plate. Apparatus for performing the method includes first and second halves of die that may be moved one relative to other between open and closed positions. Die halves are provided with respective surfaces for hot molding at least of one plate of thermoplastic material. At least one half of die includes at least one seat for injection molding coupled with respective surface made by hot molding and at least one duct for injection

molding of plastics to seat. Seat has narrowed part for lowering pressure of injected plastics at contact with plate.

EFFECT: lowered cost of mold articles, simplified manufacturing cycle for making them.

4 cl, 5 dwg